I'm really not sure if there are any differences. Maybe some of our vendors here could comment on this...

///Mantis,

I guess I don't follow. I indicated that the exhaust was currently still in the prototype stage, and in that form it was cut & weld. I also included that the production version would be bolt-on. Did you mean to say: "even the prototype I have is bolt-on"?

yes sir, everything is bolt-on, nothing is cut and weld even prototype. so yes "even the prototype i have is bolt-on"